Quick-release pitman



ct. 22, 1929. B. s: HARRIS ET AL 1,732,888

QUICK RELEASE PITMAN Filed Dec. 8, 1927 'IllllllI 6 ILL l Il Sw ||H| rda 7 1f l 5 :E;

u ab Q la @j WX a 2 GET-5-43- 1 1f 5a at e ef "alum, 1e 6 5 7 f4 5 Imm",v ab :Nw-:magi 'IWW 2 aa @C #i- HMC/M.

Patented ct. 22, 1929 masse FFI@ BURTON S. HARRIS AND HOWARD IVI.JOHNSTON, OF TORONTO, ONTARIO, CANADA,

A$SIGNORS TO MASSEY--HARRIS COMPANY, LIMITED, OF

CANADA TORONTO, ONTARIO,

QUICK-RELEASE PITMAN Application filed December 8, 1927.

This invention relates to ball and socket joints and more particularlyto the removable, releasable type having a two part socket as commonlyemployed on pitmen for use on farm implements, and our object is toprovide simple mechanism of this character which can be quickly releasedand reset. Another object is to provide means normally tending to retainthe socket parts in their operative position.

IVe attain our objects by formingthe socket Ain two relatively movableparts, for en gagement with the ball. A yoke, guided in slots formedlongitudinally of the socket parts, is formed integral with a stem whichis reciprocably carried in a recess formed in the pitman. One or both ofthe outer sides ot the socket parts are inclined and are adapted to beengaged by the jaws of the yoke. The yoke is moved, by means of aspring, to releasably lock the hinged part in its operative position. Aprojection carried by one of the socket parts forms a fulcrum for a toolwhich is engaged with the yoke to move it, against the compression ofthe spring, to its inoperative position. During this movement the yokeis withdrawn along the slots until it is in position to engage the wallat one end of a slot. This holds the yoke in its inoperative positionfor the removal of the socket from the ball. The constructions arehereinafter more fully described and are illustrated in theaccompanying` drawings in which Fig. 1 is a plan View of our socketjoint i' applied to a pitman for use on a cutter bar;

Fig. 2 a side elevation of the same;

Fig. 3 a horizontal section of the same showing the parts in theiroperative positions; and

Fig. i a view similar to Fig. 3 showing the )arts in their inoperativepositions.

In the drawings like numerals of reference indicate corresponding partsin the diferent figures.

1 and 2 are the relatively movable socket parts adapted to engage theball 3, which may be formed on the heel plate of a cutter bar not shown.The socket part 1 is connected with or formed on the pitman 4 and thesocket part 2 is hinged at 2a on the rear extension 2b Serial No.238,614.

thereof which is secured to the pitman or formed on the part 1. Thesocket part 2 has its outer side 2c inclined and preferably the outerside 1c of the part 1 is also. inclined as shown. Slots 1e and 2e areformed in the parts 1 and 2. The sides 1c and 2c incline from the slotends or shoulders 1t and 2t toward the tree ends of the parts 1 and 2.

The hinged part 2 is releasably locked, by means of a yoke 5, in its'operative position. The yoke 5 is guided in the slots 1" and 2e and istermed with aws 5EL for engagement with the inclined sides 1c and 2. Astem 5b having` one end thereof freely carried in a recess lia in thepitman is formed integral with the yoke. One end of a spring 6, disposedon the stem, engages a washer 7 also disposed on the stem and engagingthe pitman 4, and the other end of the spring engages the curved portionof the yoke. The spring thus tends to move the yoke 5 to its operativeposition and tends to force the jaws 5a along the inclined sides 1c and2c as shown in Figs. 1 and 3.

Assuming the parts 1 and 2 are in their operative position and it isdesired to remove the ball 3 from the socket, the mode of operation isas follows. A tool (not shown) is engaged with the yoke 5 and with theedge 8a of a recess formed in a projection 8 carried by the part 1. Byusing the edge 8';L as a fulcrum on which the tool is rocked, the yoke 5is moved7 against the compression of the spring 6, to its inoperativeposition in which the jaws 5a are disengaged from the inclined sides 1cand 2c. The hinged part 2 is then swung outwardly, by the application ofa slight force against the rear extension 2b, to bring the slot end orshoulder 2f substantially into alinement with the jaw 5a adjacentthereto. The yoke is thus held in its inoperative position, as shown inFig. 4. The outward swinging movement of the hinged part 2 is limited bya stop 2g which is so carried by the part 2 that it swings in adirection of rotation opposite to that of the part 2 and thus engagesthe rear extension 2b.

The socket parts are automatically reset by the spring 6 when theshoulder 2f is moved out of engagement with the end of the yoke jaw 5a.This may readily be accomplished by a slight tap against the outer sideof the hinged part 2 to swing it towards the ball.

What we claim is:

The combination with a ball and socket joint including two relativelymovable socket members for engaging the opposite sides of a ball, and aspring pressed rectilinearly sliding yoke normally engaging the membersto force them towards one another to engage the ball, of a shoulder onone of the members adapted to engage an end of the yoke, when saidmembers are spread apart, to hold the yoke out of operation, and aprojection carried by and extended from one of the members to a positionabove the yoke to form a fulcrum for a tool adapted to engage the yokewhereby the yoke may be forced against the action of the spring to itsshoulder engaging position.

Signed at Toronto, Canada, this 1st day of December, 1927.

BURTON S. HARRIS. HOWARD M. JOHNSTON.

